Good for you! I’ve read most of your posts on this subject and seems that the only one holding Tina back was Tina. Don’t fret much over those who ignore you. They may have nothing to say, or fear saying the wrong thing.
You should lose the male first name, however. Interoffice correspondence can be confusing enough without several names from the same person. Same for switching mode of dress. Tina should work the shop floor same as the office, just wear sensible shoes.